W
- Wafer (Semiconductor Wafer)
- Walk-in Refrigeration Units
- Wall Insulation
- Warm-air Furnace
- Warranty Contracts
- Waste Coal
- Waste Energy
- Waste Heat Boiler
- Waste Heat Recovery
- Waste Management in Energy Industry
- Waste Materials
- Waste Oils and Tar
- Wastewater, Domestic and Commercial
- Wastewater, Industrial
- Water Bed Heater
- Water Conditions
- Water Heated in Furnace
- Water Heater
- Water Heating Demand-Side Management Programs (DSM)
- Water Heating Equipment
- Water Injection (WI)
- Water Pollution Abatement Equipment
- Water Pumping
- Water Reservoir
- Water Saturation (Sw)
- Water Source Heat Pump (WSHP)
- Water Turbine
- Water Vapor
- Water Well
- Water Wheel
- Waterway
- Watt (W)
- Watt (W)
- Watt-Hour (Wh)
- Watthour (Wh)
- Wattmeter
- Wax
- Weather Stripping and Caulking
- Weighted Average Cost of Gas (WACOG)
- Weir
- Well
- Well Water for Cooling
- Wellhead
- Wellhead Price
- West Texas Intermediate (WTI - Cushing)
- West Texas Intermediate (WTI)
- Wet Bottom Boiler
- Wet Natural Gas
- Wheeling Charge
- Wheeling Service
- White Grease
- White Spirit
- Whole-House Cooling Fan
- Wholesale Competition
- Wholesale Electric Power Market
- Wholesale Power Market
- Wholesale Price
- Wholesale Sales
- Wholesale Transmission Services
- Wholesale Wheeling
- Wind Energy
- Wind Energy Conversion System (WECS)
- Wind Farm
- Wind Power Plant
- Wind Turbine
- Wires Charge
- Wood and Wood-Derived Fuels
- Wood Conversion to Btu
- Wood Energy
- Wood Pellets
- Working Gas
- Working Gas Capacity
- Working Interest
- Working Storage Capacity